JET JTM-4VS Mill with Acu-Rite 203 DRO, X/Y/Z-Axis Powerfeeds, and Air Powered Draw Bar is a professional-grade vertical milling machine from JET, engineered for machinists and shops that demand precision, versatility, and production efficiency. Built on the proven Certified Meehanite casting process, this variable speed mill combines a full-featured digital readout, three-axis powerfeeds, and a pneumatic draw bar into a single high-performance package - dramatically reducing setup time and maximizing cutting accuracy across a wide range of milling operations.

Key Features

• Adjustable gibs throughout for precise fit and reduced play across all axes
• Heavy duty splined motor drive delivers smooth, reliable power transmission
• Internal coolant tank built directly into the casting base for use with a coolant system (coolant pump not included)
• Large diameter chromed quill resists wear and ensures smooth, accurate quill travel
• One-shot lubrication system simplifies maintenance and extends machine life
• Precision hardened and ground ways and table provide long-term accuracy and surface integrity
• Spindle head is internally cooled to manage heat during extended machining operations
• Tolerance test sheet included for verified out-of-box accuracy
• Certified Meehanite casting process ensures consistent structural rigidity and vibration dampening
• Precision bored and honed milling head for quality, repeatable cuts
• Three-stage power downfeed with automatic stop for controlled, hands-free quill operation
• Acu-Rite 203 Digital Readout (DRO) for real-time, high-accuracy positional feedback
• X, Y, and Z-axis powerfeeds for streamlined table movement and reduced operator fatigue
• Pneumatic (air powered) draw bar for fast, effortless tool changes
• Variable spindle speed ranging from 60 to 4,200 RPM to accommodate a wide range of materials and tooling
• Available in single or three phase power configurations
• Backed by JET's industry-leading two-year full service and parts warranty

Specifications

• Stock Number: 690231
• Country of Origin: Taiwan
• Motor: 3 HP, 230/460V, 3Ph
• Range of Spindle Speeds (RPM): 60 - 4,200
• Spindle Taper: R-8
• Spindle Travel (In.): 5
• Quill Diameter (In.): 3-3/8
• Quill Down Feed Rates (IPR): .0015 - .003 - .006
• Collet Capacity: 1/8 - 7/8
• Table Longitudinal Travel (In.): 34
• Table Longitudinal Travel With Powerfeed (In.): 28-3/4
• Table Cross Travel (In.): 12
• T-Slot Centers (In.): 2-1/2
• Distance Spindle to Column, Max. (In.): 19
• Max Distance Spindle to Table (In.): 17-1/2
• Powerfeed: X, Y and Z-Axis
• Power Draw Bar: Pneumatic
• Number of Axis: 2
• Style (Type): Variable Speed R8
• Overall Dimensions (L x W x H) (In.): 66 x 63 x 85
• Prop 65: Cancer and Reproductive Harm

Frequently Asked Questions

What spindle speed range does the JET JTM-4VS offer, and how is it adjusted?

The JTM-4VS features a variable spindle speed range of 60 to 4,200 RPM, allowing operators to dial in the ideal cutting speed for a wide variety of materials and tooling diameters without stopping to change belt positions as required on step-pulley machines.

Is a coolant pump included with this mill?

The machine includes an internal coolant tank built directly into the casting base, designed for use with a coolant system. However, the coolant pump itself is not included and must be purchased separately.

What type of draw bar does this mill use, and what are the benefits?

This mill is equipped with an air powered (pneumatic) draw bar. A pneumatic draw bar allows for rapid, one-handed tool changes without the need to manually tighten or loosen the draw bar with a wrench, significantly reducing changeover time during production work.

What does the included tolerance test sheet indicate?

Each JET JTM-4VS ships with a tolerance test sheet that documents the machine's measured accuracy as verified before leaving the factory. This provides confirmation that the mill meets JET's precision standards right out of the box, giving operators confidence in the machine's baseline performance from day one.